Home / 7,221.40-10,826.70-3,938.20

Finding the Fourth Proportional to 7,221.40, 10,826.70 and 3,938.20

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Solution

The fourth proportional to 7,221.40, 10,826.70 and 3,938.20 is: 5,904.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.40 : 10,826.70 = 3,938.20 : x
  2. Step 2: Convert to fraction form
    7,221.40/10,826.70 = 3,938.20/x
  3. Step 3: Cross multiply
    7,221.40x = 10,826.70 × 3,938.20
  4. Step 4: Simplify right side
    7,221.40x = 42,637,709.94
  5. Step 5: Solve for x
    x = 42,637,709.94/7,221.40
  6. Step 6: Final answer
    x = 5,904.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.